The general recommendation for servicing a car is to have a full service once a year or every 12,000 miles (about 19,000 km), whichever comes first. This ensures the car stays in good working condition, helps avoid major repairs, and can improve fuel efficiency. For higher mileage drivers, an interim service every 6 months or 6,000 miles is advisable. Newer vehicles may have onboard systems to alert when service is needed, and checking the manufacturer's service schedule is important for exact intervals. Regular maintenance involves checks and replacements of essential fluids, filters, and other consumables to keep the car running smoothly and safely.